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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
3 4 9
6 9 1 ×
1 × 9 =
9
1 × 40 =
40
1 × 300 =
300
90 × 9 =
810
90 × 40 =
3600
90 × 300 =
27000
600 × 9 =
5400
600 × 40 =
24000
600 × 300 =
+ 180000
241159